Chair.



J. M. BAINER.

CHAIR.

APPLICATION FILED AUG. 24, 1910.

Patented Dec. 12, 1911.

x mm X? w I I IDMHIIIIII I I I I I I I I H |||I|H Ill! m m\ 3 b W F H JOSEPH M. BAINER, OF MARYSVILLE, OHIO.

CHAIR.

Specification of Letters Patent.

Patented Dec. 12, 1911.

Application filed August 24, 1910. Serial No. 578,615.

To all whom it may concern:

Be it known that I, JOSEPH M. BAINER, a cltizen of the United States, residing at Marysville, in the county of Union, State of Ohio, have invented certain new and useful Improvements in Chairs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in chairs, more particularly to chairs employed by typewriters, piano students, and the like, and has for one of its objects to improve the construction of the yieldable and adjustable backs employed in connection with chairs of this character.

With this and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims; and, in the drawings illustrative of the preferred embodiment of the invention, Figure 1 is a side elevation, partly in sect-ion, of the seat portion of a chair and a portion of the yieldable back of the chair with the improvement applied, Fig. 2 is a rear elevation of portions of the parts shown in Fig. 1.

The improved device may be applied to chair seats of various constructions, but for the purpose of illustration is shown applied to a conventional seat 10 having a screwstandard 11. The screw-standard is rigidly connected to a bracket device 12 which is screwed, or otherwise secured, as shown at 13 to the seat 10. The bracket 12 is extended forwardly and rearwardly beneath the seat and is provided with two spaced channels to receive the horizontal members of a back supporting spring, the same securing means 13 thus being employed for securing the spring and the standard bracket. A portion of the back standard of the chair is represented at 14, and connected at 15 to this standard is a housing or casing 16, the casing being smallest at its lower end and provided with a relatively contracted opening 17 in its lower end. The casing 16 is provided with a hub 18 near its upper end and formed through this hub is a threaded aperture to receive an operating screw 19, the screw having an operating wheel handle 20 at its outer end. The spring of the improved device is formed from a single piece of relatively heavy wire bent centrally upon itself to form spaced sides 21-22 and furthermore bent into coils 2324 intermediate the ends of the side members and with the remaining portions of the sides extended horizontally as shown at 25-26 and engaged in the channels of the bracket 12. The sides 21-22 of the spring are extended into the casing 16 and bear at the bight portion 27 against the upper inner side of the casing, the wei ht of the back standard 14 and the casing fieing thus borne by the rela tively heavy spring.

The inner end of the screw 19 extends between the sides 2122 of the screw and is provided with a bearing 28 by which the screw is rotatively coupled to the spring member. By this simple arrangement it will be obvious that the casing 16 together with the back standard 14 may be adjusted to alter its inclination to any required extent within the range of the interior of the casing, and without efiecting the action of the spring. The spring is relatively heavy, to enable it to withstand the strains to which it will be subjected, while at the same time is firmly supported by the screw and its coupling means.

The improved device is slmple 1n construction, can be inexpensively manufactured and applied to chairs of various sizes and to chairs having various forms of seats and back standards.

What is claimed is In a device of the character described, a wedge shaped casing adapted to be secured to the back of a chair, a spring adapted to be secured to a chair seat and extending into the wedge end of said casing .and terminating in an elongated loop the upper end of which bears against the head end of the casing, said casing being provided with a tapped bore, a screw mounted for rotation in said bore and rotatably coupled to the loop of said spring to adjustably secure the chair back at any desired angle to the spring.

In testimony whereof, I aflix my signature, in presence of two witnesses.

JOSEPH M. BAINER.

Witnesses:

T. W. MARTIN, D. O. HILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

